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Perplexity frontend engineer interview: what they actually care about

backend_bekah · 6 replies

went through Perplexity's frontend interview loop in March 2026. got the offer, accepted, so i can share fairly openly.

for context: 4 YOE in frontend, mostly React and TypeScript, some design systems work. Bay Area.

the loop

phone screen with a recruiter, then one technical screen, then 4 onsite rounds (virtual). no take-home.

technical phone screen: React-focused. they had me build a small component in a coding environment. the problem involved managing some state across multiple UI elements, nothing too wild, but they watched how i structured it and asked me about tradeoffs. they tested TypeScript comfort.

onsite rounds:

Frontend system design: the one that caught me off guard. "design the autocomplete/suggestions feature for a search bar" sounds simple but they asked deep. caching suggestions on the client side, debouncing vs throttling, handling slow network conditions, accessibility (keyboard nav, screen readers). when they mentioned accessibility, i was glad i had actual opinions on it and not just "yeah i'd make it accessible."

Coding round 1: data structures, applied to a frontend-ish context. think about rendering a large list efficiently.

Coding round 2: more React. composing components, lifting state, prop drilling vs context. they let me drive and kept asking "what would break if X changed."

Behavioral: straightforward. pick 2-3 solid STAR stories in advance. they asked about a time i disagreed with a design decision and how i handled it.

what actually matters: they want someone who understands WHY the web platform works the way it does, not just someone who can wire up components. browser rendering, repaint vs reflow, when to use a web worker, that kind of depth. not quizzed as trivia but it came up naturally in design.

comp: my offer for senior FE was around $185k base + equity in SF. i don't know what the equity refreshes look like long-term.

total process: just over 3 weeks.

6 replies

mobile_mara

the accessibility question in a design round is surprisingly rare to see asked well. glad it came up there. too many places treat it as a checkbox.

pivot_pat

FE system design is an underrated prep area. i see people grind leetcode for months and then completely blank when asked to design a real UI interaction. the autocomplete question is a classic.

frontend_fran

yes, i spent maybe 40% of my prep time on FE system design and i think it was the right call. there's less written about it than backend SD so you kind of have to think through the problems yourself.

qa_quinn

the $185k base is really helpful context. is that their standard senior IC range or did you negotiate?

sec_sasha

curious if they asked anything about frontend security. XSS, CSP, that sort of thing. or was it purely UX/performance focused?

frontend_fran

nothing security-specific came up in my loop. that said, when i mentioned sanitizing inputs during the design round it seemed noted. i wouldn't prep deep on appsec for a standard FE role there.